A friend of mine puts together batteries in a wee box and solders leads for the jack. Then he makes a dozen or so of them, thus eschewing the need for another cable on stage. I thought the idea genius for what he's doing. The alternative is a lot of duct tape. He makes the box to clip on the pedals, and changes them every gig. Measures them between and reuse if needed. He tried rechargables and says he's going to try again, they gave out too quickly.

John Conley
Musica est vita